tsan: remove dependencies on HAS_48_BIT_ADDRESS_SPACE and Mapping

[dvyukov]

Summary

Remove direct uses of Mapping in preperation for removing Mapping type
(which we already don't have for all platforms).
Remove dependence on HAS_48_BIT_ADDRESS_SPACE in preparation for removing it.
As far as I see for Apple/Mac platforms !HAS_48_BIT_ADDRESS_SPACE
simply means SANITIZER_IOS.

Depends on D107741.

[dvyukov]

changed SelectMapping to use template Arg and rebased

compiler-rt/lib/tsan/rtl/tsan_platform_mac.cpp

static void my_pthread_introspection_hook(unsigned int event, pthread_t thread,
   }
 
   if (prev_pthread_introspection_hook != nullptr)
     prev_pthread_introspection_hook(event, thread, addr, size);
 }
 #endif
 
 void InitializePlatformEarly() {
-#if !SANITIZER_GO && !HAS_48_BIT_ADDRESS_SPACE
+#  if !SANITIZER_GO && SANITIZER_IOS
   uptr max_vm = GetMaxUserVirtualAddress() + 1;
-  if (max_vm != Mapping::kHiAppMemEnd) {
+  if (max_vm != HiAppMemEnd()) {
     Printf("ThreadSanitizer: unsupported vm address limit %p, expected %p.\n",
-           max_vm, Mapping::kHiAppMemEnd);
+           max_vm, HiAppMemEnd());
     Die();
   }
 #endif
 }
 
 static uptr longjmp_xor_key = 0;
 
 void InitializePlatform() {

compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp

if (segment.protection == 0)  // Zero page or mprotected.
       continue;
     if (segment.start >= VdsoBeg())  // vdso
       break;
     Printf("FATAL: ThreadSanitizer: unexpected memory mapping %p-%p\n",
            segment.start, segment.end);
     Die();
   }
 
-#if defined(__aarch64__) && defined(__APPLE__) && !HAS_48_BIT_ADDRESS_SPACE
+#    if defined(__aarch64__) && defined(__APPLE__) && SANITIZER_IOS
   ProtectRange(HeapMemEnd(), ShadowBeg());
   ProtectRange(ShadowEnd(), MetaShadowBeg());
   ProtectRange(MetaShadowEnd(), TraceMemBeg());
 #else
   ProtectRange(LoAppMemEnd(), ShadowBeg());
   ProtectRange(ShadowEnd(), MetaShadowBeg());
   if (MidAppMemBeg()) {
     ProtectRange(MetaShadowEnd(), MidAppMemBeg());

compiler-rt/lib/tsan/rtl/tsan_rtl.h

struct AP32 {
   static const uptr kRegionSizeLog = 20;
   using AddressSpaceView = LocalAddressSpaceView;
   typedef __tsan::MapUnmapCallback MapUnmapCallback;
   static const uptr kFlags = 0;
 };
 typedef SizeClassAllocator32<AP32> PrimaryAllocator;
 #else
 struct AP64 {  // Allocator64 parameters. Deliberately using a short name.
+#    if defined(__s390x__)
+  typedef MappingS390x Mapping;
+#    else
+  typedef Mapping48AddressSpace Mapping;
+#    endif
   static const uptr kSpaceBeg = Mapping::kHeapMemBeg;
   static const uptr kSpaceSize = Mapping::kHeapMemEnd - Mapping::kHeapMemBeg;
   static const uptr kMetadataSize = 0;
   typedef DefaultSizeClassMap SizeClassMap;
   typedef __tsan::MapUnmapCallback MapUnmapCallback;
   static const uptr kFlags = 0;
   using AddressSpaceView = LocalAddressSpaceView;
 };